static/chunks/766-12dbb05e2adf85ab.js","4150","static/chunks/app/courses/%5BcourseSlug%5D/lessons/%5BunitSlug%5D/page-1fc213a0f4568bd8.js"],"Image"] 3b:T664,abstract class WebPageElement { abstract render(): string; // Return type annotation } class Header extends WebPageElement { constructor(private text: string) { // Type annotation for parameter super(); } render(): string { return `

${this.text}

`; } } class Paragraph extends WebPageElement { constructor(private text: string) { // Type annotation for parameter super(); } render(): string { return `

${this.text}

`; } } class List extends WebPageElement { constructor(private items: string[]) { // Type annotation for parameter super(); } render(): string { const itemsStr = this.items.map(item => `

${item}

`).join("\n"); return `

${itemsStr}`; } } class WebPage { private elements: WebPageElement[] = []; // Type annotation for array constructor(private title: string) { // Type annotation for parameter } addElement(element: WebPageElement): void { // Type annotation for parameter this.elements.push(element); } display(): string { // Return type annotation const elementsStr = this.elements.map(element => element.render()).join("\n"); return `\n\n ${this.title}\n\n\n ${elementsStr}\n\n`; } } // Example usage const page = new WebPage("My Web Page"); page.addElement(new Header("Welcome to My Web Page")); page.addElement(new Paragraph("This is a paragraph of text on the web page.")); page.addElement(new List(["Item 1", "Item 2", "Item 3"])); console.log(page.display());